Ore separator



Nov. s, 1927.

D. H. HERBERT Filed NOV. 14, 1925 ORE SEPARATOR 2 Sheets-Sheet l Nov. 8, 1927.

D. H. HERBERT ORE SEPARATOR Filed Nov. 14, 1.925

2 Sheets-snee,I 2

Patented Nov. 8, 1927.

DONALD H. HERBERT, 0F 'SPOKANE WASHINGTON.

ORE SEPARATOR.

Application tiled November The present invention relates to an improved ore separator and is particularly designed for use in separating gold ore from sand, gravel or other materials by agitation and magnetic force. The invention embodies certain novel combinations and arrangements of parts in a portable apparatus whereby the gathered sand and gravel are washed, screened, the heavier gold ore separated from he sand and gravel by mechanical means and the lighter or finer particles of ore separated by the use of magnets, and the tailings disposed of in a facile and economical manner.

In carrying out my invention an oscillatable shaking table or agitator and magnetic conveyers are employed and the invention consists in certain combinations of elements involving the use of these devices as will hereinafter be more specifically set forthy and claimed. .y

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention wherein a portable apparatus is illustrated which is adapted t0 be moved from place to place on sand bars and around workings in a stream of water or at other locations, and in which the parts are combined and arranged in accordance with the best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a view in side elevation of a gold separating machine according to my'invention. Figure 2 isa top plan view of the machine. n

Figure 3 is a longitudinal verticaly sectional view of the machine. with some parts omitted for convenience of illustration.

Figure 4 is an ,enlarged detailsectional view taken transversely .of|` thev machine showing a'portion of one of the magnets or magnetic conveyers.

Figure 5 is a detail perspective view showing a blades.

i ported with facilityits main frame, which is of rectangular ,shape includesapairoflona-,which is 0,11 a ifi-1 gaudinaiskidsbr,Side beams 1 and aadfipting f portion ofi one of the tailings conveyer v From the aged 0r -Skiddcd Over, 'Santi bars; to proper locations "forliklsegaIvI-d at the front end {O the framsbeams; an imrifghtSi-,IPPOF- 14, 1925. serial No. 69,028.

cated at one side of the machine for the reception of ore bearing sand, gravel, etc. and the material is fed from the hopper to a transversely disposed, rotary sieve or cylindrical screen 5. The longitudinally disposed central shaft 6 of the rotary screen and the scrcen itself are downwardly inclined from the hopper and the rotary screen which extends laterally of the machine is operated from a motor 7 supported on the mainframe of the apparatus. Through the motor shaft 8, sprocket wheel 9 thereon, chain 10 and sprocket wheel 11 on the operating shaft 12 the screen shaft is revolved by means of a sprocket wheel 13, chain 14 and sprocket wheel 15 on the screen shaft 6.

The sand and gravel are fed to the interior of the rotary screen from the hopper and the rotation of the inclined screen causes the material to be conveyed longitudinally of the screen, the ner material passing through the mesh of the screen while the coarser material is tumbled and falls by gravity toward the lower end of the rotary screen where it is deposited in a trough 16 and disposed of through the spout 17 of the trough. To wash and facilitate the screcningpof the material a water tank 18 is located adjacent to the hopper and pipe 19 is utilized to supply the water to the exterior of the screen as indicated in Figures l and 3. As the gold bearing sand and `gravel are .tumbled in the screen the finer particles pass vpan or shaking table is fashioned with a deep collection pocket 22forthc reception of the heavvl ore as it slidesl down fthe inclined n l A t n yfront wall of theshaking table and the ore. In order thatfth'e machine mayfbeltransn thus separated from'the sand and gravel .is y

fr'm thfmflchinei i collection pocket'22 of the' shakupwardly andflongitudinallyof 'the machine y "the ,tail end wherefajtransv`erselyarrameBy is provided. 'The feed-hopper.; o-f

, awed ridgey 24 is. "fashnd' in the boffm table'and.;y terminates in; an y oppositely inclined tail-end 25 of the .table which is open for disposition of the tailings from the machine.

T he shaking table is elevated and is adapted to oscillate longitudinally of the machine With a movement that results in Working the sand and gravel up the inclined bottom 23.' The sand and gravel, With Water, are normally maintained at a level with the top of the ridge 24 and the excess Water therein is free to How over the ridge and down the tail end 25.

The oscillatable table is supported by means of two pairsl of legs 2G and 27, all of which are pivoted at 28 to the main frame of the machine and at their upper ends are pivoted at 29 to the shaking table. It will be noted that the pair of legs 27 are longer than the pair 26 at the front of the machine to insure a greater vertical vibration of the front end-of the shaking table by means of which the sand and gravel are Worked or conveyed up the inclined bottom of the table as the latter oscillates longitudinally of the machine.

The shaking table or pan is operated from an eccentric disk 30 on the operating shaft 12, through a pitman 81 Which is pivoted at 32 at the under side of the bottom of they table.

As the material: is conveyed through the table, the magnetic sand particles are eX- tracted therefrom by means of a series of magnets, which While submerged below the water level move toward the tail end of the machine over the agitated sand and as this material passes up the inclined bottom of the shaking table.

These magnetic separators are carried by a pair of endless chains 33 and 34 disposed longitudinally of the machine are located at opposite sides of the shaking table. Each chain is fashioned with a triangular formation and supported on transversely disposed shafts 35, 36, 37 having sprockets 38 thereon for the chains and the shafts are journaled in a iXed frame 39 supported from the main frame of the machine above the shaking table. The upper shaft 36 and its sprocket Wheels 38 are used for driving the endless conveyer from` the screen shaft G which is provided with a sprocket Wheel 40 from which the chain 41 extends over the sprocketwheel 42 on the shaft 3G. The lower flights of the two chains are submerged and pass through the material in the pan or shaking table and these chains carry a series of magnetic collectors or conveyors located transversely of the machine and disposed in position to successively pass through the agitated sand, gravel and Water toward the rearor tail end of the machine. Each magnetic unit comprises a metallic casing 43 attached at its ends to the exterior ofthe two chains and a core comprising a series of pins 44 and congrave-l` necting wires 45 is located in each of the casings. The ends of the magnets, or the casings 43, arey guided on a pair of rails 46 which also perform the function of conductor plates which are electrically connected in suitable manner to storage batteries or other source of electrical energy. These conductor and guide plates aresupported on the frame 39 Within the shaking table and are fashioned with upwardly inclined extensions 46 above the table as best seen in Figure 3. Thus it will be apparent that as the magnets enter and are submerged in the agitated material at the left in Figure 3 they contact with and are guided by the plates 46, there,- by becoming energized and adapted to c01- lect the magnetic sand ore as they pass through the agitated material, At the right end of the frame 39 the sand bearing ma nets emerge from the material in the sha ing table and pass upwardly, still in electrical contact with the extensions 46 of the conductor and guide plates, and the fine ore is retained by the magnets until they pass from under the upper ends of these extensions, As the magnets leave the extensions 46 the former are de-energized, and the line sand carried thereby is permitted to fall by gravity into a collecting pan 47 supported in the frame 39 in position to receive the falling ore.

The tailings are continuously agitated and gradually conveyed to the tail end of the machine beyond the magnetic separator by means of transversely disposed conveyor blades or boards v48 having angular edge plates or straps 49 at their free working ends. These blades are disposed transversely of the machine and are suspended with their working edges in the material in the front of the ridge 24 of the pan and are designed to Work or kick the material over this ridge to the tail plate 25. Each blade is pivoted as at 50 in the side'bars 51 of a frame that is adapted to reciprocate longitudinally of the machine on the top edges of the sides of the shaking table. ()n the Working stroke of this frame as it moves to the ri ht in Figure 8 the boards or blades are vertical position and retained in this position by stop pins 52 fixed in the frame one at each end of each blade, in order that the Fil" i io

isposed in material may be pushed or conveyed to the the crank shaft 52 journaled in the main frame of the apparatus below the shaking table, and the crank shaft is provided with a' iso sprocket wheel 53 from which chain 54 eX- tends to the sprocket wheel 55 on the operating shaft 12. A pitman 56 is connected to the crank shaft and pivoted to a lever arm 57 on the rock shaft 58 journaled in bearings on the main frame of the machine at the tail end thereof. The lever is provided with a series of spaced holes 59 to provide for variations in the connection of the pitman thereto for the purpose of adjusting the throw of the lever 57, and the lever is connected by pivotal link 6() with the reciprocable conveyer frame 51.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is- The combination with a shaking table having a collecting pocket, of a longitudinally inclined, transversely disposed rotary screen, an inlet hopper between said screen and table7 a tailings conveyer at the rear of the table and operating means therefor, and a magnetic separator located between said pocket and conveyer.

In testimony whereof I atlx my signature.

DONALD H. HERBERT. 

